Rotational valve assembly



FIG. 1 is a perspective view of a rotational valve assembly according to the present invention;

FIG. 2 is a side view of the rotational valve assembly of FIG. 1;

FIG. 3 is a front view of the rotational valve assembly of FIG. 1; and,

FIG. 4 is a back view of the rotational valve assembly of FIG. 1. 

CLAIM The ornamental design for a rotational valve assembly, as shown and described. 